From: Jakob Koschel Date: Wed, 6 Apr 2022 18:05:30 +0000 (-0400) Subject: dlm: remove usage of list iterator for list_add() after the loop body X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c490b3afaa579ab238f78c762d703441ccc898bd;p=linux.git dlm: remove usage of list iterator for list_add() after the loop body In preparation to limit the scope of a list iterator to the list traversal loop, use a dedicated pointer to point to the found element [1]. Before, the code implicitly used the head when no element was found when using &pos->list. Since the new variable is only set if an element was found, the list_add() is performed within the loop and only done after the loop if it is done on the list head directly. Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1] Signed-off-by: Jakob Koschel Signed-off-by: Alexander Aring Signed-off-by: David Teigland --- diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index f5330e58d1fcb..20eca22617112 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -1321,13 +1321,17 @@ static inline void unhold_lkb(struct dlm_lkb *lkb) static void lkb_add_ordered(struct list_head *new, struct list_head *head, int mode) { - struct dlm_lkb *lkb = NULL; + struct dlm_lkb *lkb = NULL, *iter; - list_for_each_entry(lkb, head, lkb_statequeue) - if (lkb->lkb_rqmode < mode) + list_for_each_entry(iter, head, lkb_statequeue) + if (iter->lkb_rqmode < mode) { + lkb = iter; + list_add_tail(new, &iter->lkb_statequeue); break; + } - __list_add(new, lkb->lkb_statequeue.prev, &lkb->lkb_statequeue); + if (!lkb) + list_add_tail(new, head); } /* add/remove lkb to rsb's grant/convert/wait queue */